Radio Broadcast (May-Oct 1925)

Record Details:

Title:
Radio Broadcast
Date:
May-Oct 1925
Publisher:
Garden City, N.Y., Doubleday, Page & company [etc.]
Volume:
Radio broadcast ..
Leaf #:
000456
Language:
English
Subjects:
radio periodical, Radio -- Periodicals
Contributor:
Library of Congress, MBRS, Recorded Sound Section
Sponsor:
Library of Congress, Motion Picture, Broadcasting and Recorded Sound Division
Coordinator:
Media History Digital Library
Description:
Radio Broadcast supported home listeners of the new technology of radio – for building or buying a receiving set to explaining the technology used by the new radio stations. Throughout the magazine shows the cultural influence of radio as it evolved from hobbyist to mainstream. -- David Pierce, 2011
Date Added:
September 29, 2022
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432 RADIO BROADCAST ADVERTISER PERFECT FILAMENT CONTROL The result of more than twenty years' research and experience in the manufacture of graphite disc rheostats for radio, mines, mills, etc. Use the same Bradleystat for ALL Radio Tubes with, out changing connections. Only Graphite Discs provide noiseless filament control A spot of light, silently guided by an automatic electric oscillograph, traced the above curves on a moving photographic film. The test, made at the University of Wisconsin, was impersonal and impartial. The result, however, proves beyond a doubt the superiority of the Bradleystat for radio filament control. The first line (No. 1) shows the silent, stepless variation produced by the Bradleystat. The following curves (Nos. 2, 3, 4, and 5) were produced by other types of rheostats, some using loose powder instead of graphite discs. See the scratchy, noisy control. Every jog in the white lines means a distracting noise in the loud-speaker. Is it any wonder that Bradleystats are being substituted for ordinary rheostats by thousands of set owners? Try one, yourself, and hear the difference! Mail the Coupon ^* for Literature Mfrs. of graphite disc rheostats for over twenty years. \ it Tested and approved by Radio Broadcast